Dark aquarium. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Dark aquarium. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

If you have an aquarium, you have admired its silent inhabitants more than once. But, of course, it never occurred to you to close the window with a sheet of cardboard. Meanwhile, the aquarium gives the most interesting spectacle precisely in a well-darkened room!

It is difficult to pick up a cardboard box in the whole window. Yes, this is not necessary. Take as much piece of cardboard as you can get, and cover the rest with a blanket. Cut a slot in the cardboard 2 cm wide and 10 cm high and pin it with buttons to the window frame. The rays of the sun will pass through the gap with a wide ribbon. On their way, set up an aquarium as shown in the picture. The rays must pass through two walls of the aquarium, converging at an angle. In the place where they fall, put a sheet of white paper. On this paper you will get a wonderful colored ribbon! The order of colors in it will be exactly the same as in the rainbow: red, orange, yellow, green, blue, indigo, violet.

Aquarium in the dark

This experience is best when the sun is low. For him, windows facing east or west are convenient. Through a window facing south, the rays of the sun will fall too steeply. You will have to attach a mirror outside the window so that it reflects the rays of the sun in a horizontal direction.

If you don't have an aquarium, don't worry. A beautiful rainbow can be obtained with a bowl of water. Only in this case you will also need a mirror 12 cm wide and 20 cm high.

Aquarium in the dark

A ray of the sun will pass through the gap in the cardboard sheet that covers the window and fall into the bowl. There it dives into the water, bounces off the mirror, resurfaces, and hits a sheet of paper pinned below the slit. You get a rainbow with red at the top and blue at the bottom!

Author: Galpershtein L.Ya.

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